JP2000286006A - Waterproof connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof connector capable of improving assembly workability. SOLUTION: Wire insertion holes 21 are formed on a one wall part 17c of an outer housing 17, rubber plug accommodating recessed part 19 accommodating rubber plugs 18 having cylinder parts 18c, 18c' on both end sides are formed inside of the one wall part 17c, wire insertion holes 33 are formed on a one wall part 28c of a spacer 28, a recessed part 28e accommodating the cylinder part 18c of one side of the rubber plug 18 is formed outside of the one wall part 28c, tapered surfaces 19a, 28d are formed at the entrance sides of the rubber accommodating recessed parts 19 and the recessed part 28e, and when temporarily locking the rubber plug 18 between an outer housing 17 and the spacer 28 before inserting a wire 20 into wire insertion holes 21 of the outer housing 17 and wire insertion holes 33 of the rubber plug 18 and the spacer 28, the cylinder parts 18c, 18c' at the both sides of the rubber plug 18 are freely accommodated in at least one of the rubber accommodating recessed part 19 or the recessed part 28e.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small, multi-pole waterproof connector having improved waterproofness between a connector housing and a plurality of wires connecting terminals.

[0002]

2. Description of the Related Art The applicant of the present invention applied for a waterproof connector of this kind in Japanese Patent Application No. 10-162521. This will be specifically described with reference to FIGS. 4 to 6. As shown in FIGS. 4 and 5, the connector housing 1 of the waterproof connector 10 ′
Reference numeral 1 denotes an inner housing 12 made of synthetic resin in which a plurality of terminal accommodating chambers 13 are integrally formed;
Outer housing 17 made of a synthetic resin in which
And the inner housing 12 and the outer housing 1
7 and a spacer 28 made of a synthetic resin for holding the female terminals (terminals) 14 housed in the respective terminal housing chambers 13 of the inner housing 12.

[0003] The inner housing 12 has a box portion 12a having an open upper and lower rear surface, respectively, and is provided in a space formed by a central horizontal wall 12b and upper and lower vertical side walls 12c also serving as partition walls. Each terminal accommodating chamber 13 is formed. The female terminals 14 are accommodated in the respective terminal accommodating chambers 13. Locking claws 15 are integrally formed on both sides and the center of the upper and lower surfaces of the box portion 12a, respectively, and flanges (not shown) are integrally formed on the front ends of the centers of both sides. In addition, box part 1
A rectangular insertion hole 12d through which a male terminal of a mating connector (not shown) is inserted is formed at a position of the front wall 2a facing each terminal accommodating chamber 13. Further, the box portion 14 of the female terminal 14
a pair of press-contact blades 14b, 14b
Is formed by bending.

The outer housing 17 has an inner wall portion 17a having a substantially square cylindrical shape, an outer wall portion 17b having a substantially square cylindrical shape including the inner wall portion 17a, and a bottom wall connecting the rear portions of the inner and outer wall portions 17a and 17b. The portion (one wall portion) 17c has a double box shape with an open front side. The center of the bottom wall portion 17c is thick, and a large-diameter circular cross section in which a waterproof rubber plug 18 'is housed by press-fitting or the like at a position facing each terminal accommodating chamber 13 on the front side of the thick wall portion. The rubber plug accommodating recesses 19 are formed respectively, and a small-diameter, circular cross-section wire insertion hole 21 through which the electric wire 20 penetrates communicates with the corresponding rubber plug accommodating recess 19 on the rear side of the thick portion. Each is formed. The waterproof rubber plug 18 'is formed in a substantially cylindrical shape with its inner and outer peripheral surfaces each having an uneven shape, so that the electric wire 20 can be penetrated therein without any gap.

The inner wall 17 of the outer housing 17
On both front sides of the upper and lower walls of the inner housing 12, rectangular locking holes (not shown) are formed, on which the respective locking claws 15 on both sides of the upper and lower surfaces of the box portion 12a of the inner housing 12 are engaged and disengaged. In the center of the front side of the upper and lower walls of the portion 17a, rectangular and long locking holes 23 are formed respectively, in which the respective locking claws 15 at the center of the upper and lower surfaces of the box portion 12a of the inner housing 12 are disengaged. Further, a V-shaped packing receiving portion 25 for receiving an annular rubber waterproof packing 24 is formed integrally with the inner wall portion 17a of the outer housing 17 on the outer surface side.

The spacer 28 is formed integrally with a substantially rectangular tubular body 28a fitted on the inner surface side of the inner wall 17a of the outer housing 17 so as to be bent rearward from the front end of the body 28a. Square flange 28b fitted on the outer surface side of the inner wall 17a of the cylinder 17
And a bottom wall (one wall) 28c of the body 28a has a box shape with an open front side.

The box portion 12a of the inner housing 12 is fitted inside the body portion 28a of the spacer 28. The rear end edges of the box portion 12a of the inner housing 12 and the rear end edge of the box portion 14a of the female terminal 14 housed in each terminal accommodating chamber 13 are respectively engaged with the inner surfaces of the upper and lower walls of the body portion 28a of the spacer 28. The protrusions 29 for preventing the terminals from falling off are formed integrally with each other.

A notch 30 is formed at a position opposite to the locking claw 15 and the flange 16 of the inner housing 12 at the front side of the connection between the body 28a and the flange 28b of the spacer 28. is there. The upper and lower cutouts 3
On the outer surfaces of the upper and lower walls of the body portion 28 a of the spacer 28 between the 0 and 30, locking claws 32 which are engaged and disengaged from the respective locking holes 23 of the outer housing 17 are integrally formed. Further, the distal end of the flange portion 28b of the spacer 28 holds the packing 24 engaged with the packing receiving portion 25 of the inner wall portion 17a of the outer housing 17 when the fitting to the outer housing 17 is completed.

An electric wire insertion hole 33 is formed on the bottom wall portion 28c of the spacer 28 at a position facing each electric wire insertion hole 21 of the outer housing 17. The bottom wall portion 28c of the spacer 28 holds the rubber plug 18 'inserted into each rubber plug accommodating recess 19 of the bottom wall portion 17c of the outer housing 17 when the fitting to the outer housing 17 is completed. ing. Then, as shown in FIG. 5, each wire insertion hole 21 of the outer housing 17 and each rubber plug 1
Each of the electric wires 20 penetrating through the electric wire through hole 18 b of the 8 ′ and the electric wire insertion hole 33 of the spacer 28 is connected to the inner housing 12.
The female terminals 14 accommodated in the respective terminal accommodating chambers 13 are connected by pressure contact between a pair of press contact blades 14b, 14b, and the terminal accommodating chambers 13 and the electric wires 20 are sealed by rubber plugs 18 and packings 24, respectively. It has become so.

Furthermore, the bottom wall 1 of the outer housing 17
An inverted conical surface (tapered surface) 19a is formed on the inlet side of each rubber stopper accommodating recess 19 inside 7c. An inverted conical surface (tapered surface) 28d also serving as a rubber stopper pressing portion is formed around each electric wire insertion hole 33 outside the bottom wall portion 28c of the spacer 28. Then, before accommodating (fitting) the rubber plug 18 ′ in each rubber plug accommodating recess 19 of the outer housing 17 (the spacer 2 is inserted into the inner wall portion 17 a of the outer housing 17).
8) (in a temporarily locked state shown in FIG. 4) in which the front side of the body portion 28a is fitted), the inverted conical surface 19a of each of the rubber plug accommodating recesses 19 and the reverse around the electric wire insertion hole 33 of the spacer 28. A rubber stopper 18 'is interposed between the conical surface 28d and the conical surface 28d.

Further, as shown in FIG.
Conical surfaces (tapered surfaces) 18a, 18a are formed on both end sides of the rubber plug 18 'through which. The inner diameter Rb of the rubber plug 18 '(that is, the wire insertion hole 1 of the rubber plug 18').
8b) is set to be equal to or larger than the diameter R of the electric wire 20 (Rb ≧ R). In addition, rubber stopper 1
The outer diameter Ra of 8 'is formed so as to be larger than the diameter D of the rubber plug accommodating concave portion 19, and is set so that a sealing relationship (Ra-Rb + R> D) is established in the rubber plug accommodating concave portion 19. is there.

When assembling the waterproof connector 10 'having the above structure, the packing receiving portion 25 of the inner wall portion 17a of the outer housing 17 outside the connector housing 11 is used.
The packing 24 is inserted and set in advance. Then, the electric wires 20 are passed through the plurality of electric wire insertion holes 21 of the bottom wall portion 17c of the outer housing 17 from outside thereof, and then the rubber plugs 18 'are passed through the electric wires 20, and then the bottom wall of the spacer 28 is formed. Each electric wire 20 is penetrated from the outside into each electric wire insertion hole 33 of the portion 28c.

Next, as shown in FIG. 4, each rubber stopper 18 '
Is not housed in each rubber plug accommodating recess 19 inside the bottom wall portion 17c of the outer housing 17,
9 and an inverted conical surface 28d around each wire insertion hole 33 of the bottom wall portion 28c of the spacer 28 so as to sandwich the front side of the body portion 28a of the spacer 28 with the inner wall portion of the outer housing 17. 17a and temporarily locked. Then, a pair of press-contact blades 14 b of each terminal 14 in which each electric wire 20 is accommodated in a plurality of terminal accommodating chambers 13 of the inner housing 12 inside the connector housing 11,
14b.

Next, as shown in FIG. 5, the electric wires 20 are slid with respect to the bottom wall 28c of the spacer 28 and the respective electric wire insertion holes 33, 21 of the bottom wall 17c of the outer housing 17, as shown in FIG. The inner housing 12 is fitted into the body 28a of the
a is completely fitted into the inner wall portion 17a of the outer housing 17 and fully locked, the bottom wall portion 28c of the spacer 28
Each rubber plug 18 'is pressed and housed in each rubber plug housing recess 19 by an inverted conical surface 28d around each electric wire insertion hole 33, whereby the waterproof connector 10 in which each electric wire 20 is sealed by each rubber plug 18'. Is completed. In this manner, the spacer 28 in which the inner housing 12 is fitted in the outer housing 17 through the rubber plug 18 'in a temporarily locked state.
Since the wire 20 is not pressed by the rubber plug 18 'when it is fitted inside, the electric wire 20 can be smoothly assembled without buckling, and the overall assembling workability is further improved.

[0015]

In the prior art waterproof connector 10 ', the rubber plug 18' is connected to the rubber of the outer housing 17 in order to reduce the insertion force (insertion force) of the electric wire 20 into the rubber plug 18 '. The front side of the body portion 28a of the spacer 28 is fitted into the inner wall portion 17a of the outer housing 17 without being completely fitted into the plug accommodating concave portion 19, so that the spacer 28 is temporarily locked (temporarily set). At the time of this temporary locking, the rubber stopper 1
The conical surfaces 18a, 18a at both ends of the 8 'are connected between the inverted conical surface 19a of the rubber plug accommodating concave portion 19 of the outer housing 17 and the inverted conical surface 28d around each wire insertion hole 33 of the bottom wall portion 28c of the spacer 28. For example, if the wire 20 is put in the temporary locking state before the electric wire 20 is inserted (inserted),
The rubber plug 18 'is prevented from coming off, and the posture of the rubber plug 18' is stabilized, so that the workability of assembling the waterproof connector 10 'is further improved. Inverted conical surface 19a of housing 17 and spacer 28
Because it is merely a pinch between the inverted conical surface 28d of
Rubber stopper 18 'is moved to outer housing 17 by vibration or external force.
There is a possibility that the inverted conical surface 19a may come off between the inverted conical surface 28d of the spacer 28.

Further, as shown in FIG.
Since the conical surface 18a of the 8 'and the inverted conical surface 19a of the rubber plug accommodating recess 19 of the outer housing 17 are in surface contact, the frictional force is large, and the rubber plug 18' is connected to the outer When the rubber plug 18 'is pressed and accommodated in the rubber stopper accommodating recess 19, the force of inserting the rubber stopper 18' into the rubber stopper accommodating recess 19 may increase, and the workability of assembling the waterproof connector 10 'may be deteriorated.

The present invention has been made in order to solve the above-mentioned problems, and has as its object to provide a multi-pole waterproof connector capable of improving the assembling workability.

[0018]

According to a first aspect of the present invention, a plurality of terminal accommodating chambers are formed in a connector housing, and a terminal to which an electric wire is connected can be freely accommodated in each of the terminal accommodating chambers. In a waterproof connector in which a chamber and the electric wires are freely sealed with a rubber stopper, the connector housing includes an inner housing in which each of the terminal accommodating chambers is formed,
An outer housing in which the inner housing is fitted; and a spacer interposed between the inner housing and the outer housing for holding terminals accommodated in the respective terminal accommodating chambers of the inner housing; An electric wire insertion hole is formed in one wall portion facing each of the terminal accommodating chambers, and a cylindrical portion is provided at both ends at a position inside the one wall portion facing each of the electric wire insertion holes. A rubber plug accommodating recess for accommodating a rubber plug is formed, and an electric wire insertion hole is formed in one wall portion of the spacer opposed to each electric wire insertion hole of the outer housing, and the outer side of the one wall portion is formed. A concave portion for accommodating the cylindrical portion on one end side of the rubber plug is formed at a position facing each of the electric wire insertion holes, and a taper is formed at an entrance side of each rubber plug accommodating concave portion. And a tapered surface is formed on the entrance side of each of the concave portions, and before the electric wires are inserted through the electric wire insertion holes of the outer housing, the electric wire insertion holes of the rubber plugs, and the electric wire insertion holes of the spacer. When the rubber plug is temporarily locked between the outer housing and the spacer, the cylindrical portions on both ends of the rubber plug are attached to at least one of the inside of the rubber plug accommodating recess and the inside of each of the recesses. The rubber plug is housed, and both sides of the rubber plug are sandwiched between the tapered surfaces of the rubber plug housing concave portions and the tapered surfaces of the concave portions, respectively, and the electric wire insertion holes of the outer housing and the electric wire insertion holes of the rubber plug are provided. And the electric wires penetrating through the electric wire insertion holes of the spacer are freely connectable to the terminals accommodated in the respective terminal accommodating chambers of the inner housing.

[0019] In this waterproof connector, both ends of the rubber plug are temporarily locked before the electric wire is inserted between both sides of the rubber plug between the tapered surface of the rubber plug receiving concave portion of the outer housing and the tapered surface of the concave portion of the spacer. Since each tubular portion is housed in at least one of the rubber housing recess of the outer housing and the recess of the spacer, the rubber plug is prevented from coming off between one wall of the outer housing and one wall of the spacer. Is done. Thereby, the posture of the rubber plug is stabilized when the electric wire is inserted, and the workability of assembling the waterproof connector is improved.

According to a second aspect of the present invention, in the waterproof connector according to the first aspect, a tapered surface of the rubber plug accommodating recess is provided at a base end of an outer peripheral surface of a cylindrical portion at the other end of the rubber plug. It is characterized in that a curved annular projecting portion that comes into contact is formed.

[0021] In this waterproof connector, when the electric plug is inserted between the tapered surface of the rubber plug accommodating concave portion of the outer housing and the tapered surface of the concave portion of the spacer before the electric wire is inserted, the rubber plug has a curved annular shape. Since the projecting portion and the tapered surface of the rubber housing recess of the outer housing make point contact, the spacer is fitted into the outer housing and the temporarily locked spacer is completely fitted into the outer housing via the rubber plug. In the final locking, the frictional force between the rubber plug accommodating concave portion of the outer housing and the rubber plug is stabilized and reduced. Thereby, the force for inserting the rubber plug into the rubber plug housing recess is reduced, and the workability of assembling the waterproof connector is improved.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of the waterproof connector according to the embodiment in a state where the outer housing and the spacer are temporarily locked.
2 is an enlarged sectional view of a main part of the waterproof connector, and FIG. 3 is an enlarged sectional view of a portion B in FIG.

As shown in FIG. 1, the connector housing 11 of the waterproof connector 10 includes an inner housing 12 made of a synthetic resin integrally formed with a plurality of terminal accommodating chambers 13 as in the prior art, and an inner housing 12 made of a synthetic resin. An outer housing 17 made of a synthetic resin to be fitted therein, and female terminals (terminals) 14 interposed between the inner housing 12 and the outer housing 17 and accommodated in the respective terminal accommodating chambers 13 of the inner housing 12 are held. And a spacer 28 made of synthetic resin.

Here, an inverted conical surface (tapered surface) 19a is formed on the inlet side of each rubber plug accommodating concave portion 19 inside the bottom wall portion (one wall portion) 17c of the outer housing 17.
A recess 28e having the same diameter as the rubber plug accommodating recess 19 is formed at a position outside the thick bottom wall (one wall) 28c of the spacer 28 and opposed to each wire insertion hole 33. An inverted conical surface (tapered surface) 28d also serving as a rubber stopper pressing portion is formed on the entrance side of the concave portion 28e. The rubber plug 1 is inserted into each rubber plug accommodating recess 19 of the outer housing 17.
8 is completely housed (fitted) (outer housing 17).
In the temporary locking state shown in FIG. 1 in which the front side of the body 28a of the spacer 28 is fitted into the inner wall portion 17a of FIG. 1, the inverted conical surface 19a of each of the rubber plug accommodating recesses 19 and the spacer 2
8, both sides of the rubber plug 18 can be sandwiched between the inverted conical surface 28d of each of the electric wire insertion holes 33.

As shown in FIG. 1 and FIG.
Are formed at both ends of the rubber stopper 18 through which the cylindrical portions 18c and 18c 'are formed. The outer diameter d of each of the cylindrical portions 18c and 18c 'of the rubber stopper 18 is set so as to be equal to or smaller than the diameter D of the rubber stopper accommodating recess 19 (d≤D). Further, between both sides of the rubber stopper 18, the inner and outer peripheral surfaces are respectively substantially cylindrical with irregularities. That is, on the base end side of the outer peripheral surface of the cylindrical portion 18 c ′ on the other end side of the rubber plug 18, a curved annular (arc-shaped cross-section) protrusion 1 that makes point contact with the inverted conical surface 19 a of the rubber plug housing concave portion 19.
8d is integrally formed and protruded, and the concave portion 28 is formed at the base end of the outer peripheral surface of the cylindrical portion 18c at one end of the rubber plug 18.
A circularly curved (arc-shaped cross-section) projection 18d that makes point contact with the inverted conical surface 28d of e is integrally formed. Since other configurations are the same as those of the waterproof connector 10 'of the prior art, the same components are denoted by the same reference numerals and description thereof will be omitted.

When assembling the waterproof connector 10 of the above embodiment, the packing receiving portion 25 of the inner wall portion 17a of the outer housing 17 forming the outside of the connector housing 11 is used.
The packing 24 is inserted and set in advance.

Next, each of the cylindrical portions 1 at both ends of each of the rubber stoppers 18 will be described.
8c and 18c 'are respectively housed in the concave portions 28e outside the bottom wall portion 28c of the spacer 28 and the rubber plug housing concave portions 19 inside the bottom wall portion 17c of the outer housing 17, respectively. Curved annular projections 18
d and 18d are sandwiched in a point contact state between the inverted conical surface 19a of each rubber plug accommodating recess 19 and the inverted conical surface 28d of the spacer 28 so that the front side of the body 28a of the spacer 28 is formed on the inner wall of the outer housing 17. It is fitted into the portion 17a and temporarily locked.

Then, as shown in FIG. 2, each electric wire insertion hole 21 of the bottom wall 17c of the outer housing 17, the electric wire insertion hole 18b of each rubber plug 18, and the bottom wall 28c of the spacer 28 are provided.
After each electric wire 20 is penetrated from the outside in the order of each electric wire insertion hole 33, each electric wire 20 is connected to the connector housing 11.
A pair of press-contact blades 14b, 14 of each terminal 14 housed in the plurality of terminal housing chambers 13 of the inner housing 12 forming the inside of the inner housing 12.
b.

Next, the inner housing 12 is fitted into the body portion 28a of the spacer 28, and the body portion 28a of the spacer 28 is completely fitted into the inner wall portion 17a of the outer housing 17 and fully locked. The rubber plugs 18 are pressed and accommodated (fitted) in the rubber stopper accommodating recesses 19 by the recesses 28e and the inverted conical surface 28d of the bottom wall portion 28c of the spacer 28, whereby the respective electric wires 20 are sealed by the rubber stoppers 18. The assembly of the waterproof connector 10 is completed.

As described above, the projections 18d, 18d on both sides of each rubber plug 18 between the inverted conical surface 19a of each rubber plug accommodating concave portion 19 of the outer housing 17 and the inverted conical surface 28d of each concave portion 28e of the spacer 28. At the time of temporary locking before insertion of the electric wire shown in FIG.
8c and 18c 'are accommodated in the concave portion 28e of the spacer 28 and the rubber plug accommodating concave portion 19 of the outer housing 17, respectively, so that the bottom wall portion 17c of the outer housing 17 and the bottom wall portion 28c of the spacer 28 are formed. It is possible to reliably prevent the rubber stopper 18 from coming off from between. Thereby, the electric wire 20 is connected to the bottom wall 1 of the outer housing 17.
7c each wire insertion hole 21 and each rubber plug 18 wire insertion hole 1
8b and each wire insertion hole 33 in the bottom wall portion 28c of the spacer 28
When the rubber plug 18 is inserted in this order, the posture of the rubber plug 18 can be stabilized, and the workability of assembling the waterproof connector 10 can be improved.

The inverted conical surface 19a of the rubber plug accommodating recess 19 of the outer housing 17 and the recess 28e of the spacer 28 are provided.
During the above-mentioned temporary locking before inserting the electric wire between the rubber plug 18 and the inverted conical surface 28d of the rubber plug 18, the curved conical projection 18d of the rubber plug 18 and the inverted cone of the rubber plug accommodating recess 19 of the outer housing 17 are formed. The body portion 2 of the spacer 28 which is fitted into the inner wall portion 17a of the outer housing 17 and temporarily locked via the rubber plug 18 by the point contact with the surface 19a.
When completely engaging the inner wall portion 17a of the outer housing 17 with the inner wall portion 8a of the outer housing 17, the frictional force between the rubber plug housing concave portion 19 of the outer housing 17 and the rubber plug 18 is stably and reduced. it can. Thus, the force of inserting the rubber plug 18 into the rubber plug housing recess 19 can be reduced, and the workability of assembling the waterproof connector 10 can be improved.

According to each of the above embodiments, the case where the electric wire is press-connected to the press contact terminal has been described. However, the terminal is not limited to the press contact terminal, and the above embodiments are also applicable when the electric wire is crimped to the crimp terminal. Can of course be applied.

[0034]

As described above, according to the waterproof connector of the first aspect of the present invention, both sides of the rubber plug are sandwiched between the tapered surface of the rubber plug housing concave portion of the outer housing and the tapered surface of the concave portion of the spacer. At the time of temporary locking before insertion of the electric wire, each cylindrical portion at both ends of the rubber plug is housed in at least one of the rubber plug housing concave portion of the outer housing and the concave portion of the spacer, so that one wall portion of the outer housing is provided. The rubber plug can be reliably prevented from coming off from between the spacer and one wall of the spacer. Thereby, the posture of the rubber plug can be stabilized when the electric wire is inserted, and the workability of assembling the waterproof connector can be improved.

According to the waterproof connector of the second aspect of the present invention,
A curved annular projection of the rubber plug and the rubber plug of the outer housing are inserted at the time of temporary locking before the electric wire is inserted between both sides of the rubber plug between the tapered surface of the rubber plug receiving concave portion of the outer housing and the tapered surface of the concave portion of the spacer. Since the tapered surface of the receiving recess makes point contact with the outer housing, the spacer in the provisionally locked state is completely fitted into the outer housing through the rubber plug and is completely fitted into the outer housing. The frictional force between the rubber plug accommodating recess of the outer housing and the rubber plug can be stably and reduced. Thus, the force of inserting the rubber plug into the rubber plug housing recess can be reduced, and the workability of assembling the waterproof connector can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a temporarily locked state of an outer housing and a spacer of a waterproof connector according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of the waterproof connector.

FIG. 3 is an enlarged sectional view of a portion denoted by reference numeral B in FIG. 2;

FIG. 4 is a sectional view showing a state in which the outer housing and the spacer of the waterproof connector according to the prior art are temporarily locked.

FIG. 5 is a cross-sectional view showing a fully locked state of the outer housing and the spacer of the waterproof connector of the prior art.

6A is an enlarged explanatory view of a main part of the waterproof connector of the prior art, and FIG. 6B is a partially enlarged cross-sectional view of the main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Waterproof connector 11 Connector housing 12 Inner housing 13 Terminal accommodating chamber 14 Female terminal (terminal) 17 Outer housing 17c Bottom wall part (one wall part) 18 Rubber plug 18b Wire insertion hole 18c One end side cylindrical part 18c 'The other end side Cylindrical portion 18d curved annular projection 19 rubber plug housing recess 19a inverted conical surface (tapered surface) 20 electric wire 21 electric wire insertion hole 28 spacer 28c bottom wall (one wall) 28d inverted conical surface (tapered surface) 28e concave 33 Wire insertion hole

Claims (2)

[Claims] A plurality of terminal accommodating chambers are formed in a connector housing so that terminals connected to electric wires can be accommodated in the respective terminal accommodating chambers, and the terminal accommodating chambers and the electric wires can be sealed with rubber stoppers. In the waterproof connector described above, the connector housing is provided with an inner housing in which each of the terminal accommodating chambers is formed, an outer housing in which the inner housing is fitted, and an inner housing interposed between the inner housing and the outer housing. And a spacer for holding the terminals accommodated in the respective terminal accommodating chambers of the housing. An electric wire insertion hole is formed in each of the wall portions of the outer housing opposed to the respective terminal accommodating chambers. A rubber plug accommodating concave portion for accommodating the rubber plug having a cylindrical portion at both ends is provided at a position opposed to each of the electric wire insertion holes on the inner side. On the other hand, an electric wire insertion hole is formed in one wall portion of the spacer facing the electric wire insertion hole of the outer housing, and the rubber is provided at a position outside the one wall portion and opposed to the electric wire insertion hole. Forming a concave portion in which the cylindrical portion on one end side of the plug is housed, and forming a tapered surface on the entrance side of each of the rubber plug housing concave portions, and forming a tapered surface on the entrance side of each of the concave portions, The rubber plug is temporarily locked between the outer housing and the spacer before the electric wire is inserted into each of the electric wire insertion holes of the outer housing, the electric wire insertion hole of the rubber plug, and the electric wire insertion holes of the spacer. At this time, each of the cylindrical portions at both ends of the rubber plug is housed in at least one of the rubber plug housing concave portion and each of the concave portions, and both sides of the rubber plug are tapered surfaces of the rubber plug housing concave portions. And each said concave The electric wires passing through the respective electric wire insertion holes of the outer housing, the electric wire insertion holes of the rubber plugs, and the respective electric wire insertion holes of the spacer are inserted into the respective terminal accommodating chambers of the inner housing. A waterproof connector characterized by being freely connectable to the terminal accommodated in the connector. 2. The waterproof connector according to claim 1, wherein the rubber plug has a curved annular shape that is in point contact with the tapered surface of the rubber plug housing recess at the base end of the outer peripheral surface of the cylindrical portion at the other end of the rubber plug. A waterproof connector characterized by forming a projection.